Document Detail

Partial pacemaker recycling of implanted QRS-inhibited pulse generators.
MedLine Citation:
PMID:  83633     Owner:  NLM     Status:  MEDLINE    
In the evaluation of twenty-three patients with implanted QRS-inhibited lithium-powered pulse generators (Intermedics C-MOS-1 and ARCO L1-2D), we repeatedly observed the phenomenon of partial pacemaker recycling (PPR), in which the escape interval induced by a premature ventricular beat is shorter than the automatic interval (AI). In order to determine the sensing properties of these pulse generators, programmed chest wall stimulation (CWS) was systematically performed in all 23 patients and, in addition, intracardiac programmed ventricular stimulation (PVS) via temporary intravenous pacing catheters was performed in 9 of them. The AI of these pulse generators ranged from 820 to 860 msec and absolute refractory periods (ARP) from 220 to 330 msec. Precise correlation in determining pacemaker sensing properties could be demonstrated between CWS and PVS. The phenomenon of PPR occurred 110 to 240 msec following ARP with both CWS and PVW, and appeared to be time- rather than voltage-dependent. We conclude that: (1) CWS is a safe, simple and accurate method for studying pacemaker sensing properties, and (2) time-dependent PPR is a normal electrical feature of certain implanted QRS-inhibited lithium-powered pulse generators.
R J Sung; A Castellanos; R J Thurer; R J Myerburg
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Pacing and clinical electrophysiology : PACE     Volume:  1     ISSN:  0147-8389     ISO Abbreviation:  Pacing Clin Electrophysiol     Publication Date:  1978 Apr 
Date Detail:
Created Date:  1979-03-13     Completed Date:  1979-03-13     Revised Date:  2005-11-17    
Medline Journal Info:
Nlm Unique ID:  7803944     Medline TA:  Pacing Clin Electrophysiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  189-95     Citation Subset:  IM    
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MeSH Terms
Cardiac Pacing, Artificial / methods*
Electric Power Supplies
Electrodes, Implanted
Pacemaker, Artificial / standards*
Reg. No./Substance:

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